Andean Slaty Thrush
Turdus nigriceps
The Andean slaty thrush is 18 to 23.5 cm (7.1 to 9.3 in) long and weighs 50 to 67.5 g (1.8 to 2.4 oz). The species is sexually dimorphic. Adult males have a mostly slate-gray head with a pale eye-ring and a dark-streaked white throat. Their upperparts, wings, and tail are slate-gray. Their underparts are a slightly paler slate-gray; birds in the north of their range have darker underparts than those in the south. Adult females have a greenish brown head and upperparts and somewhat paler greenish brown underparts. Both sexes have a dark iris, a yellow bill, and yellow legs and feet. Voice: The Andean slaty thrush sings only in the austral summer breeding season. Its song is usually given from a hidden perch and is a ventriloquial "series of rather high, jumbled phrases, some notes high-pitched, rapid, shrill and burry but followed by long pause, tji tjihe tjie tjihe or swidrielipik tillie.
ID text from Wikipedia, CC BY-SA 4.0
Plumbeous-backed Thrush
Turdus reevei
The plumbeous-backed thrush is 23 to 24 cm (9.1 to 9.4 in) long and weighs 61 to 66 g (2.2 to 2.3 oz). The sexes have almost the same plumage. Adult males have a mostly bluish slate-gray head with a dark-streaked white throat. Female's heads are slightly browner. Both sexes have bluish slate-gray upperparts, wings, and tail. They have a white crescent below the streaked throat, a pale gray breast that becomes white on the belly and vent, and an orange-buff wash on the flanks. Both sexes have a white to bluish white iris, a pale yellow bill, and pale yellow legs and feet. Voice: The plumbeous-backed thrush appears to sing only during the breeding season. Its song is "a fairly fast, typical Turdus caroling". Its most common call is "an abrupt and piercing, descending pseeeu". Other calls include "a ringing tseeet" and "a wheezy, rising rheet".
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
Learn this pair in the BeakBrain App
Photo and call practice. Coming soon to iPhone and Android.
Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Andean Slaty Thrush and Plumbeous-backed Thrush.